Acetylene-lamp.



F. E. BALDWIN. ACETYLENE LAM'P.

APPLICATION FILED SEPT.12 ,1913.

1,083,427. Patented Jan. 6, 1914.

[ma/Q27";

. sudden. increase of air UNITED STATES PATENT" OFFICE.

EREDERIC E. BALDWIN, OF NEW YORK, N. Y.

AcnrrLIiNn-mrrr.

' Specification of Letters Patent.

. mama Jan. 6, 1914.

Application filed September 12, 1913. Serial No. 789,421.

in acetylene lamps and particularly miner's" acetylene lamps. In lamps of this class, it common to provide a reflecting device back of the burner and, owing to the rough conditions under which such lamps are used, such reflectors are subjected to blows I which bend and distort them.

F urthermore, it sometimes happens that when a ressure is caused in a mine, asfor examp e at the time of a blast, such increased pressure tends to prevent the outward flow of acetylene to the burner, so that the flame is ei'itinguished, thus necessitating the religli'ting of the lamb.

T e principal objectofthis invention is to provide a reflector mounting and a bracing device therefor whereby the reflector will he held against distortion by ordinary blows and at. the same time a simple and light construction is permitted.

A further object is to combine with such reflector bracin device means for preventing the flame rom being extinguished by sudden increases in air'pressure in the mine.

With these general objects in view, the im vention consists in the features, details of construction and combination of parts which will first be fully described and then particularly pointed out.

. In the drawings illustratin the best embodiment of the invention,-- igure 1 is an elevation, partly in section, of a lamp embodying the. present invention. Fig. 2 is a, front elevation, partly broken away, of the same lamp. Fi 3 is a horizontal sectional view on the line 3-3, Fig. 1.

Referring to the drawings, 1' is the upper part of the lamp and 2 the lower part, these two parts being united in any suitable way, asfor example by screw threads as shown, a gasket or, packing ring 4: bcln inserted between two flanged portions 0 the two parts. The upper part 1 is provided with a diaphragm 5 and has a closedtop 6 protwccn the reflector and the casing is 'a reflector bracing device or support of vided with a .tubulature and closed bya head or cap 8,.usually provided with {an air-hole. To the diaphragm 5. and depend- ;ing therefrom is secured a water supply pipe 9 terminating a short distance above the bottom of the .lamp. Through the top (5 ot the lamp and through the ,water sup ply pipe 9 -cxtends'elfpokin -rod'-"1O, whose outer end is bent atjzian ang e to serve as a handle. The rod lO-does not fittightly in the ivater supply pipe 9, but is so proportioned as to provide a small annular space around said rod .10 so as to permit the desired feed of water from above the partition 5 to the lower part of the lamp. T he space above the partition 5 serves as a wartcr-chambcr and the-spacejn the bottom of the lamp serves as a enerato'r-chamber in which is placed carbitfi The upper part of the lam is rovided with a burner tube 11 just be ow the partition 5, this burner'tube-extending outward in a radial directionas shown in Fig. 1. Against its inner end is placed'a body of porous material serving as a filter, this porous material usually consisting of a piece of felt, or the like, asindicated at 12, Figs. 1 and 3. The felt is held in place between the innerend of the burner tube 11 and the water supply pipe 9 by its own elasticity. The burner tube is' provided outside the lamp casing witha reflectorlB removably secured to the burner tubc in any suitable way, as for example by a screw thread connection shown in Fig. 1. At the extreme outer end of the burner tube is mounted a burner 1.4, which fitstightly on the end of the between the back ofthe re ector '13 an the adjacent outer wall of the lamp casing. Be-- ated Yention, this reflector bra'cing device is made in the form of a. circular boxing, shown in the drawing as somewhat trumpet-shaped, the bottom of said boxing being so sh'aped' 6 as to fit against the lamp casing. This'boxits axis and from. the burner tube as to ing isindicatcd-at 15 and, in the present example, is provided with inwardturned ilanged'outer edges which bear againstthe lmuk of the refit-(tor at such a distance from give a good support to the reflector.

' The interior of the boxing, in the best embodiment of the invention, is in commlmication with the outer air through suitable openings, as for example the openings 16 in the reflector around'the burner tube and openings 17 in the periphery ofthe boxing as shown in Figs. 1 and 3. The boxing. is put in place by slipping it over the burner tube,. whereupon the reflector may be- Screwed onto the burner tube and as'it comes in contact with the outer face of the boxing, it will clampthe same and'bring' it to a central position, that is to sa a position coaxial with the burnertube. urthrnore, owing to the resiliency of the flanged outer edges of the boxing, the latter-will: accommodate themselves to the back of the reflector so as to provide a uniform support, notwithstanding any -slight. variatiOndfin manufacture. The burner isthen slipped over the projecting end of the burner tube where it is held by friction. By unscrewin Q the reflector, the burner will be forcedo the end of the burner tube and upon re moval of the reflector the boxing 15 mafi removed if desired.- This. boxing is a, 11-. venient receptacle for spare burners. In that embodiment of the invention 40 comprising all the advantageous features,

the boxing is arranged to contain a suitable pressure controlling means comprising a reservoir for gas, arranged to have its capacity varied by changes of atmospheric pres-' sure. In the resent example, this reservoir consists of a ag 18 of elastic material such as rubber, located within theboxin 15and having its interior in communication with the interior of the burner tube and advan-\ 5 tageously just back of the burner. In the present example, I have illustratedthis controlling means as an annular bag surroundin the burner tube. The bag 18 is provided with a tubing 19 of astl'c material such as rubber, which connects with the tube 20 projecting from the burner tube and having its free end bent over in order to permit the quick and convenient attach: ment and removal of the bag 18. In order to strengthen the tube 20, it may be soldered orotherwise attached to the front of the lamp casing. The boxin 15 is provided with a-suitable o ening, t rough which the tubing 19 of the ag 18 may extend.-

It will be observed that when water is fed the tube 20 and the bag extinguished by compressin Under these conditions, the boxing 15 from the water-chamber. to the generatingchamber in thewell' known manner, the

'through't e porous material '12 to and of this pressure to drive back the outflowing gas. in the burner tube 11 will be overcome the compression of the elastic bag 18,

which will result in an equally sudden increase of pressure within the burner tubejust' backof the burner, thus balancing the pressure inside said burner tube with. the

pressure of the air outside the lamp. Upon a fall of pressure outside, the ba 18 will again ex and-to it's'normaldimensions. By means 0 the flexible connection 19 between 18, the further advantage is attained t at-in case'a leak should occur in said bag and gas from the generating-chamber escape from this leak and ignite, the flame may be' immediately the elastictube 19, as with the fingers. hen the lamp is used under conditions where the sudden increase in pressure is not to be feared, the bag 18 may readily be removed'and-the end of the tube 20plugged in any suitable wing?- comes a convenient place in which to carry .It will be noted that ale bi 18 case.

tutes a means for varying .t 1e pressure 'within'the burnertube, in response to the variations of the atmospheric pressure to which the burner is exposed. Since the inner end of the tube 20 is very close to the burner, an increase in pressure upon the bag'18 wil produce an immediate correspo'ndin end of t e burner, thus at once counteracting aifl tendency to put out the light. This plis'hed 'if the counteracting pressure were compelled to-travel any appreciable distance before reaching the inner end of theburner. What is claimed is 1. The combinatiom-with a lamp casing' arranged tofurnish a supply of gas anda burnertube projecting thercfrom,'of a reincrease of pressure at the inner result-could not be satisfactorily accom-"no fiector cairiedby and detachable from the burner tube, and-a reflector supportmounth. ed between the lam casing and the -back of the reflector and c amped in place by said reflector. f 1

2.. The combination, with a lamp casing; a burner tube rejecting therefrom, and a reflector carried by the. burner tube, of a support surrounding the burner tube, said support. having its rear face engaging the lamp "casing and its'front arranged to an ort the reflector at a distance from the urner tube.

its

3. The combination. with a lamp casing, a burner tube projecting therefrom, and a reflector carried by the burner tube eta point away from said easing, of a support surrounding the burner tube and having its rear face engaging the lamp casing, said support having an open front end arranged to engage the back of the reflector at a plurality of PUllli n remote from the burner tube.

'4, The combination, with a lamp easing, a burner tube projecting therefron'i, a retleelor held to the burner tube by screw threads. and a burner on the end of the burner tube beyond the rellector, of a substantially cylindrical support surrounding the burner tube and having its rear end shaped to lit the lamp casing, the front end of said support being arranged to contact with the back face of the reflector, substantially in a circle concentric with the burner tube.

5. In an acetylene lamp, the combination, with a ca ing containing a gassuppl v chamber. a burner tube leading from said gassupply chamber, and a burner outside the lamp and carried by said burner tube, of a pressure controlling device located outside the lamp casing and havin its interior in communication with the interior of the burner tube back of the burner.

. G. In an acetylene lamp, the combination, with'a lamp casing containing a gas-supply chamber, a burner tube leading therefrom, a burner outside the casing and :arried by the burner lube. and a reflector carried by the burner tube at a point away from said casing. of a reflector support surrounding the burner tube and having its rear face engaging the lamp casing and its front arranged to support the reflector away from the burner-lube. and a pressure controlling de .vice located within said "support and having its interior in counnunicathnrwith the interior of the burner tube back oftlie burner;

In testimony whereof, I have hereunto set my hand, in the presence of two subscribing witnesses.

FEEDER-1C E. 'BALDVIN. \Vitnesses A. \Vnrrn 1. X. Ti noun. 

